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通过静电吸引力将两个生物活性 - 两分子结合成纳米纤维的自组合
Krista L Niece1, Jeffrey D Hartgerink, Jack J J M Donners
1Departments of Materials Science, and the Feinberg School of Medicine, Northwestern University, 2220 Campus Drive, Evanston, Illinois 60208, USA.
Journal of the American Chemical Society
|June 12, 2003
概括
研究人员开发了一种新方法,通过混合相反电荷的PAs来制造- (PA) 纳米纤维. 这种自组装策略产生混合组成的纳米纤维,用于细胞疗法和组织工程的潜在用途.
科学领域:
- 生物材料科学 生物材料科学
- 纳米技术纳米技术
- 生物化学 生物化学
背景情况:
- 氨基分子 (PAs) 是多功能分子,可自组装成纳米结构.
- 目前用于创建复杂的PA纳米结构的方法在结合各种功能时经常面临局限性.
- 开发将多种PA类型集成到单个纳米结构中的方法对于先进的应用至关重要.
研究的目的:
- 引入一种新的方法来制备- (PA) 纳米纤维.
- 为了使PA与不同的生物活性氨基酸序列结合到单一纤维中.
- 探索这些新型复合纳米纤维的自组装机制和潜在应用.
主要方法:
- 单独合成相反电荷的两性蛋白 (PA).
- 将单独合成的PA混合在一起,以在生理pH下诱导自我组装到纳米纤维网络中.
- 通过传输电子显微镜 (TEM) 和核磁共振 (NMR) 光谱学来描述由此产生的纳米结构.
主要成果:
- 成功形成由纳米纤维网络组成的凝.
- 传输电子显微镜证实了均纳米纤维的形成,直径约为7nm,长度为几微米.
- 核磁共振和显微镜数据表明,这些纳米纤维是圆柱状的,由负荷相反的PAs之间的静电吸引形成.
结论:
- 已经建立了一种用于- (PA) 纳米纤维制剂的新策略,允许共同组装不同的PA序列.
- 由此产生的复合纳米纤维是通过静电吸引形成的,形成混合组成的圆柱状.
- 这种自组装方法对最小侵入性细胞疗法和体外组织工程中的应用具有前景.
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